#include <stdio.h>
void up_and_down(int);
int main()
{
    up_and_down(1);
    return 0;
}
void up_and_down(int n)
{
    printf("Level %d: n location %p\n", n, &n);
    if (n < 4)
        up_and_down(n + 1);
    printf("Level %d: n location %p\n", n, &n);
}